Civil Engineering - Building Materials
Exercise :: Building Materials - Section 2
| 36. |
Which one of the following is an air binding material ? |
| A. |
Gypsum | | B. |
Acid-resistant cement | | C. |
Quick lime | | D. |
All of these. |
Answer: Option D
Explanation:
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| 37. |
A good quality stone absorbs water less than |
Answer: Option A
Explanation:
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| 38. |
Pick up the correct statement from the following: |
| A. |
Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite | | B. |
Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite | | C. |
Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic | | D. |
All the above. |
Answer: Option D
Explanation:
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| 39. |
Plywood is made from |
| A. |
common timber | | B. |
bamboo fibre | | C. |
teak wood only | | D. |
asbestos sheets. |
Answer: Option C
Explanation:
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| 40. |
Soundness test of cement determines |
| A. |
quality of free lime | | B. |
ultimate strength | | C. |
durability | | D. |
initial setting | | E. |
all the above. |
Answer: Option A
Explanation:
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